Birds of North America: A Guide to Field Identification. A Golden Field Guide
Robbins, Chandler S., Bertel Bruun, and Herbert S. Zim
Warblers of the Great Lakes Region and Eastern North America
Earley, Chris G.
Oklahoma Breeding Bird Atlas [HC]
Reinking, Dan L.
Hummingbirds of North America: Attracting, Feeding, and Photographing
The Sibley Guide to Bird Life and Behavior
Sibley, David Allen
Hummingbirds of North America: The Photographic Guide
Howell, Steve N.G.
National Geographic Field Guide to the Birds of North America, Seventh Edition
DUNN, Jon L. and Jonathan ALDERFER
The Hawaiian Honeycreepers
Pratt, H. Douglas
The Warblers of North America [Third Edition]
CHAPMAN, Frank M.
The American Robin: A Backyard Institution
Illustrations by Hall, Martha R.
Birds of New York State
The Sibley Guide to Birds, First edition, first printing